The Diamondbacks have let it be known that the team is open to trading pitcher Trevor Cahill, outfielder Cody Ross and second baseman Aaron Hill, CBSSports.com Baseball Insider Jon Heyman reports.

Diamondbacks general manager Dave Stewart indicated Monday that he has not spoken to teams about any of the three players.

Hill is expected to open the season as the team's starting second baseman, while Ross is likely to compete for at-bats in left field. Cahill is not a lock to open the season in the team's rotation even if he remains on the Diamondbacks.

Diamondbacks second baseman Aaron Hill has left a strong impression on chief baseball officer Tony La Russa through the early days of spring training, per MLB.com.

"He definitely is in the competition for playing time," La Russa said. "That's just front office talking, remember that, because [manager] Chip [Hale] makes out the lineup. I'm just echoing what Chip has seen. I'm sure he would say the same thing to you."

"My body feels great," Hill said. "My swing feels great. Everything is where I'd like it to be." That's an encouraging thought after Hill went through some struggles last season. The 32-year-old hit just .244/.287/.367 over 501 at-bats.

Some of those issues were due to injuries, though Hill refused to blame his struggles on medical issues. "Some years you have bumps and bruises that you deal with all year, and whether or not that affects the performance ... I don't know. I'm never going to blame anything on that," he said.

Hill is owed $12 million in both 2015 and 2016. He could turn into a useful trade piece if he's able to bounce back this season.